This information is for old Samsung Tizen watches (Gear, Galaxy 2,3).
The app for Samsung Wear OS watches
(Galaxy 4,5,...) is in Google Play Store.

The Samsung Gear S2 smartwatch app Tide Table Chart provides quick and easy access to high tide and low tide forecasts.

Rotate back / forward for high and low tides of the next day or tap the Play button to run an animation of moon phase and tide changes for a quick overview.

This Gear S2 app can be used without connection to your phone. But you should run the Android phone app Tide Table Chart once per week to update the tide data on your watch.

Link to Gear S2 app Tide Table Chart:
Sorry, Samsung does not support Web links to Gear apps.
Please open on your phone the Gear Manager app and search there for Tide Table Chart.

The Samsung watch app works only with the Android phone app, it can not connect to the iPhone app!

The app for Samsung Wear OS watches (Galaxy 4,5,...) is in Google Play Store.